<div id="section_nav">
  <ul>
    <li class="music"><a href="{% url music_index %}">Music</a></li>
    <li class="movies"><a href="{% url movie_list %}">Movies</a>
      <ul>
        <li class="genres"><a href="{% url movie_genre_list %}">Genres</a></li>
        <li class="studios"><a href="{% url movie_studio_list %}">Studios</a></li>
      </ul>
    </li>
    <li class="books"><a href="{% url book_list %}">Books</a></li>
  </ul>
</div>